对CCLabelTTF进行自动换行，显示打字效果（转）

有时候我们在开发cocos2d游戏的时候&＃xff0c;会用到任务的对话&＃xff0c;或者在做任务的时候跟npc进行对话。这几天正好项目需要&＃xff0c;就写了个简单的label&＃xff0c;效果就是我们打字一样&＃xff0c;一个一个显示出来&＃xff0c;自动换行。在我这个例子中&＃xff0c;我把总的行数限定4行&＃xff0c;根据这个先决条件写了下面的几行代码&＃xff0c;仅供参考&＃xff01;&＃xff01;

ary &＃61; [NSMutableArray arrayWithCapacity:20];

[ary retain];

int length &＃61; [copyStr length];

int line &＃61; 1; // 必须要有一行

int wordCount &＃61; 0; // 标记第几个字

for (int i &＃61; 0; i

{

// 发现回车行数加1

if ([copyStr characterAtIndex:i] &＃61;&＃61; &＃39;\n&＃39;) 

{

line&＃43;&＃43;;

//NSLog(&＃64;"subStr &＃61;&＃61;&＃61; %&＃64;",[copyStr substringToIndex:i]);

[ary addObject:[copyStr substringToIndex:i]];

//NSLog(&＃64;"剩余的字符串:%&＃64;",[copyStr substringFromIndex:i&＃43;1]);

copyStr &＃61; [copyStr substringFromIndex:i&＃43;1];

length &＃61; [copyStr length];// 截取了回车之前的部分之后&＃xff0c;就要从新计算剩余字符串的长度

wordCount &＃61; 0;

i &＃61; 0;

}

if (wordCount*14 > 300) 

{

line&＃43;&＃43;;

//NSLog(&＃64;"第一次截取 :%&＃64;",[copyStr substringToIndex:wordCount]);

[ary addObject:[copyStr substringToIndex:wordCount]];

copyStr &＃61; [copyStr substringFromIndex:wordCount];

//NSLog(&＃64;"省下的 &＃61;&＃61;&＃61; %&＃64;",copyStr);

length &＃61; [copyStr length];

if (length

{

[ary addObject:copyStr];

}

//NSLog(&＃64;"省下的长度 &＃61;&＃61;&＃61; %d",length);

wordCount &＃61; 0; // 如果发现&＃xff0c;到某个字的时候&＃xff0c;总的宽度大于了300我们就要手动换行&＃xff0c;然后从新开始记数

i &＃61; 0; // 从新开始循环变量也要归0

}

//NSLog(&＃64;"i &＃61;&＃61; %d",i);

wordCount&＃43;&＃43;;

}

//CGSize size &＃61; [kString sizeWithFont:[UIFont fontWithName:&＃64;"Arial-BoldMT" size:14] constrainedToSize:CGSizeMake(300, 1000) lineBreakMode:UILineBreakModeWordWrap];

//[self schedule:&＃64;selector(setSubString:) interval:0.03];

}

NSMutableArray* array &＃61; [NSMutableArray arrayWithCapacity:10];

NSMutableString* mStr &＃61; [[NSMutableString alloc] init];

int lineCount &＃61; 0;

int maxLine &＃61; [ary count];

// 4句话合成一句话

for(NSString* str in ary)

{

[mStr appendString:str];

lineCount&＃43;&＃43;;

if(lineCount%4&＃61;&＃61;0||lineCount>&＃61;maxLine)

{

[array addObject:[NSString stringWithFormat:&＃64;"%&＃64;",mStr]];

[mStr deleteCharactersInRange:NSMakeRange(0, [mStr length])];

}

}

// 获取完之后&＃xff0c;由于从新组合了数组&＃xff0c;我们把这哥ary清空&＃xff0c;从新放入新数组中的对象&＃xff0c;就是一个方便

[ary removeAllObjects];

for (int n &＃61; 0; n <[array count]; n&＃43;&＃43;) 

{

//NSLog(&＃64;"array[%d] &＃61;&＃61; %&＃64;",n,[array objectAtIndex:n]);

[ary addObject:[array objectAtIndex:n]];

}

// 标记重新组合的字符串在数组中的索引

printID &＃61; 0;

[self nextPrint];

return self;

}

-(void)nextPrint

{

// 标记搜索到的字符数

printIndex &＃61; 0;

strPrint &＃61; [ary objectAtIndex:printID];

// 求拿出来的字符串的长度

maxPrint &＃61; [strPrint length];

printID&＃43;&＃43;;

[self schedule:&＃64;selector(print:) interval:0.05];

}

-(void)print:(ccTime)step

{

printIndex&＃43;&＃43;;

[self printString:strPrint index:printIndex];

if(printIndex>&＃61;maxPrint)

{

[self unschedule:_cmd];

if (printID <[ary count]) 

{

[self nextPrint];

}

}

}

-(void)printString:(NSString*)str index:(int)index

{

[label setString:[str substringToIndex:index]];

}